The SOCPC did not accept the recommendations for new detailed occupations based on Classification Principle 1 which states that occupations are assigned to only one occupational category and Classification Principle 9 on collectability. Metrology and calibration functions or tasks may be performed by workers in several occupations, such as Electrical Engineers, Industrial Engineers, Mechanical Engineers, Aerospace Engineering and Operations Technicians, Electrical and Electronic Engineering Technicians, Electro-Mechanical Technicians, Industrial Engineering Technicians, and Mechanical Engineering Technicians. The number of workers performing metrology and calibration tasks as their primary activity is not substantial enough to support new detailed occupations.

The SOCPC reviewed and modified definitions for engineers, engineering technicians, and production workers, to clarify coverage of metrology and calibration tasks. Also, the SOCPC recommended removing "Calibrators" from the title of 51-2093 "Timing Device Assemblers and Adjusters."